The word apprenticing is playable in Words With Friends™, no blanks required. Because it is longer than 7 letters, you would have to play off an existing word or do it in several moves.
Words With Friends™ Letter Score: 25
Highest Scoring Words With Friends™ Play In The Letters apprenticing
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Seven Letter Word Alert: (61 words)
airpipe, ancient, antigen, cannier, canting, cantrip, capping, carping, carting, catenin, certain, citrine, craning, crappie, crating, earning, entrain, epicarp, gentian, granite, igniter, inciter, inertia, ingrain, ingrate, napping, nearing, nippier, nipping, paining, painter, pairing, panting, parting, pertain, picante, picrate, picrite, piecing, pinnate, prating, priapic, pricing, raining, ranting, rapping, reaping, regnant, reicing, reining, renting, repaint, ripping, tangier, tapping, tearing, tiering, tinnier, tippier, tipping, tracing